Raleigh's total market is small compared to NYC's, of course (~2 million in 2013). Even then I can't believe a high fraction of work in the Research Triangle area is tech related. Aside from the 3 universities, it just doesn't have many significant tech employers these days. It's been decades since anyone mentioned tech business in RTP in the same breath as other hubs in the vicinity like DC, Charlotte, Atlanta, or Houston.
Searching for largest employers in Durham and Wake county, you'll see that there's a lot of tech. IBM is third largest overall employer in Durham, SAS is fifth in Wake, Cisco is seventh, followed by plenty of others that aren't quite as big. (Red Hat headquarters are here but they don't even make the list I searched http://d4.nccommerce.com/QCEWLargestEmployers.aspx).
What the triangle doesn't have is "sexy" tech. There's a lot of medium or small satellite offices, companies like Fidelity, Lenovo or Credit Suisse hiring people, and so on. Far fewer consumer oriented startups.
They all employ thousands or close to it in RTP/Raleigh. These are just the ones I thought of off the top of my head, I am sure there are others.
IBM alone employs 10,000 people in RTP.
There is a large government contractor presence in the triangle (DC is what, a 30 minute flight?). Epic's main office, Nvidia and Kitware have offices.